Something worse than a burner blow out I think.
Picture 1 shows a classic burner blow out as subsequently described but the ac is on the threshold.
In pics 3 and 4 the ac is on the taxiway still belching smoke, i.e not a burner blow out which has cancelled correctly to dry range nozzles. Could the reheat fuel still be pumping into the nozzles?
I (we) should really get out more.
Ray